background: bakers, due to the nature of their jobs, are at risk of musculoskeletal disorders (msds) caused by ergonomic factors. the purpose of this study was to evaluate the biomechanical risk factors for msds in bakers. materials and methods: in the current study, all sangak, taftoon, and lavash bread bakeries in gonabad, iran, were selected based on census method. then, hierarchical task an...